I added user to group wheel and i uncommented the line in /etc/sudoers:

# Same thing without a password
%wheel ALL = (ALL) NOPASSWD: ALL

System still requires root´s password (run as root) in KDE4 (for example
YaST, Install software, start root mode krusader ...), but it works in KDE3
without any fault.
Why does root's privileges in KDE4 still require password?
Why it doens´t work in KDE4 in the same way as in KDE3?